Twyer.



N0. 694,004. I Patented Feb. 25, 1902.

G. DOAN.

T W Y E R.

[Application med my 1o. 1901.)

(No Model.)

ATTHNEYS log 1 VNrrnn STAT-Es PATENT OFFICE.

GERARD'DOAN, OF UNION SPRINGS, NEW YORK.

TWYER.

SPECIFICATION forming' part of Letters Patent N o. 694,004, datedebruary 25, 19702l Application fled J'uly 10, 1901. Serin-l No. 67,730. (No model.)

To all whom, it may concern:

Be it known that I, GERARD DOAN, a citizen of the United States, residing at Union Springs, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Twyers, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same.

The object of my invention is to provide a twyer for use in forges, &c., of a new and improved form, so constructed that the amount, force, and point of delivery of the blast carried to the re therethrough may be easily and quickly controlled within wide limits irrespective of the air-pressure of the air-supply source.

To such ends my invention consists in substance of a twyer head or cap adapted to be set in the bottom of the forge provided with an upwardlyextending ash-flange, within which ash-iiange are a plurality of circular air-orifices of different diameters and concentrically arranged, an annular base-piece provided at one side with an air-supply pipe adapted to receive air from the nozzle of a bellows or blowpipe connected thereto, which annular base-piece is provided on the top surface with a stop lug or lugs rigidly secured to the twyer-head below the forge, an air plug or cock provided with an actuating handlever supported in the central hole of the base-piece and extending up through the same into the tWyer-head, and a hollow headpiece secured upon the top of the air plug or cock having atop air-regulating plate provided with circular perforations adapted to be brought into and out of registry with the like perforations of the twyer-head, so as to regulate and direct the blast, and provided at the bottom with a stop lug orlugs adapted to coact with the stop lug or lugs of the top of the base-piece to prevent movement of the plug.

In the accompanying drawings, forming part of this specication, in which like numerals of reference designate corresponding parts in the several views, Figure 1 is a side view in perspective of my improved form of twyer.. Fig. 2 is a side View of the air plug or cock, having its hand-lever removed therefrom. Fig. 3 is a View in detail of the annular basepiece carrying the air-pipe. Fig. 4 is a side View in detail of the twyer-head. Fig. 5 is a top View of such twyer-head; Fig. 6, a side View of the hollow head piece which I employ; Fig. 7, a plan view thereof. Fig. 8 is a top plan view of the removable perforated airregulating plate carried by the hollow headpiece, the same being shown on an enlarged scale from the other figure in order to show the arrangement of the perforations. Fig. 9 is a View of all of the parts assembled, as shown in Fig. 1, in central vertical section thereof; Fig. 10, a plan View of the device shown in Fig. 3, and Fig. 1l a bottom plan View of the device shown in Figs. 6 and 7.

My improved twyer is formed of any suitable metal, usually cast-iron, and the twyerhead 11 consists of a casting usually of the form shown, open at the bottom and provided with a horizontally-extending upper flange 12 and an upwardly-extending ashflange 13. The top plate 14, lying within the ash-liange 13, is provided with any desired number of circular orifices 15 and 16 of different sizes, usually four of each,which, as shown in Fig. 5, are arranged concentrically, the larger orifices 15 being nearest to the flange 13 and the smaller orificesl being arranged concentrically within the same nearer to the center. Such twyer-head is usually provided upon one side with a securing-slot 17, adapted to receive the lug 18, cast integral with the annular head 18 of a hollow tubular base-piece 19,' which is furthermore secu rel y and rigidly secured to the twyer-head by means of two or more suitable screws 20, and .such twyerhead' is usually provided on the outwardlyextending annular iiange 12 with suitable holes 21, by which the same may be secured iirmly to the bottom plate of the forge.

The hollow base-piece 19 is provided on one side with an annular inlet-pipe 22, usuallyV of the conical form shown, which is connected by clay-luiing or in any other desired manner with the nozzle of a bellowsof ordinary IOO cap 37, secured to the elbow 35.

size of the lugs 24: and the space between the lugs 23 is therefore capable of oscillation upon the hollow base-piece 19. This hollow headpiece is provided with a top air-regulating plate 26, usually formed separate from such headpiece, as shown, and provided with side lugs 27, iitting into sockets 28, formed to receive them in the upper edge of such hollow headpiece. The larger perforations 15 of the plate 26 are of the same size and number as the holes 15 of the top plate of the twyerhead 11; but thc smaller holes or perforations 16' thereof are in number double that of the holes 16 and are all of the same size as the holes and perforations 16 and are arranged in pairs, as shown, with a space of greater width than the diameter between them, the center of oneof each of such pairs of holes 16' being coincident with radii drawn from the center of such plate through the center of such holes 15. The hollow headpiece 25 is rigidly secured upon the top of the hollow air plug or cock 29 usually by means of the pin 30, which passes through suitable holes (not shown) formed in the lugs 24 of such headpiece and through like holes V31 in the top portion of such air plug or cock, and such air plug or cock is inthe form of a pipe and is provided at the center with an air-entrance hole 32 of the same size and diameter as the inner end of the inlet-pipe 22, and

such air-plug 29 lits snugly, but so as to rotate therein. In the central orifice of the hollow base-piece 19 and as shown in Figs. 1 and 9 and formed integral therewith or secured iirmly thereto at the bottom is a shoulderpiece 33, usually of the form shown, to which is connected, usually by a short piece of pipe 34 andan elbow 35, an actuating hand-lever 36, which is usually in the form of a tube closed at the end by a cap 37, as shown.

The parts being disassembled, in order to assemble the same into operative position the shoulder-piece 33, if formed separately, is firstsecured upon the air plug or cock 29. The short pipe 34 is then secured to the shoulderpiece 33, the elbow 35 secured upon the pipe 34, and the hand-lever 36, provided with the The air plug or cock is then passed up into the central hollow of the base-piece 19, and the hollow headpiece is secured in position upon the top of such plug 29 by means of the pin 30. The twyer-head 11 having been placed in position in the forge and secured therein by mortar or by means of screws passing through the holes 21, the air-regulating plate 26 is placed in position on'top of the hollow headpiece 25, and such hollow headpiece is then passed up into the central hollow chamber of the twyer-head 1l and firmly secured thereto by means of the screws 20, when the parts will be in the position shown in Figs. l and 9. The relative dimensions and construction of the various parts is such that when in position and when the lever 36 is forced fully to the right, so as to bring the lugs 24: fully against the lugs 23 in this position, `the airhole 32 of the air-plug 29 will be in exact registry with the oriiice of the air-pipe 22, and at the same instant the holes 15' and the holes 16 will be the one in rcgistry with the holes 15 and the other in registry with'the holes 16 ofthe top plate of the twyer-head 11, whereby it will be seen that the blast of air supplied to the twyer-frame the pipe 22 will pass up through such holes, and a portion of the same will be directed through the center of the fire through the perforations 16, and that a much larger' portion will be directed through the outer portion of the fire through the perforations 15. It now the hand-lever be turned to the left, it will be seen that this will so oscillate the plate 26 as to gradually cut ott the air from these holes and that by -this means the quantity delivered to the central portion of theiire and to periphery thereof may be varied within wide limits without changing the air-pressure, and if now-the lever be pushed farther in the same direction this will completely shut oil the large holes and at the same time bring into registry the smaller holes 16" of the air-regulating plate` 26, and at such times only a small quantity of air will be delivered through the twyer to the fire, and the pressure will be then greatly reduced by the gradual closing of the airpipe 22 by the turn of the air-plug 29, and all the air will be directed to the center of the lire, and a further turn will completely cut off the iow of air. l

By this construction it is evident that any desired quantity of air may be fed to the fire and that the same may be directed to the center and the circumference or to the center alone, as may be desired for various sorts of heating.

While I have shown only eight holes in the top plate of the twyer-head and twelve in the air-regulating plate thereunder and which coact therewith, said holes being arranged in concentric circles,l do not limit myself to such exact construction and arrangement, as it is evident that the holes in said plate may be differently arranged and may be of any desired number and a different number of airregulating plates revolubly mounted may be employed and other changes in and modifications of the construction may be made without departing from the spirit of rnyinvention or sacrificing its advantages.

, Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, ism

1. A twyer-head provided with a perforated top plate and an ash-tlange surrounding the same, a hollow base-piece secured to the bottorn of the twyer-head, a tubular air-plug extending through the said base-plate and open at one end and provided with a side orifice, a hollow oscillating headpiece secured to the top of the air-plug within the twyer-head and provided with lugs coacting with lugs upon the base-piece, a lever connected with thc air- IOO for supplying air to the orifice of said plug,

substantially as shown and described.

2. A tWyer-head casing provided with a top plate having perforations arranged in separate circles therein, an air-regulating platev beneath said top plate and provided with per-` forations arranged in separate circles and adapted to register with those in said top plate, one set of 'said holes in each of said plates being larger than the others, means for admitting air to the twyer-head and devices for oscillating said air-distributing plate, substantially as shown and described.

3. A hollow'twyer-head provided with a perforated top plate, a hollow oscillating headpiece mounted in said twyer-head and pro'- vided with an air-distributing plate having perforations adapted to register with those in the top plate, a hollowr base-piece secured to the bottom of the twyer-head and provided with lugs which operate in connection with other lugs formed on the headpiece, anoscillating tubular air-plug mounted in the basepiece and connected with the headpiece, means for supplying air to said plug, and a device for oscillating said plug, substantially as shownand described.`

4. A hollow twyer-head provided with a perforated top plate, a hollow oscillating headpiece mounted in said twyer-head and provided with an air-distributing plate having perforations adapted to register with thosein the top plate, a hollow base-piece secured to the bottom of the twyer-head and provided with lugs which operate in connection ywith other lugs formed con the headpiece, an 0scillating tubular air-plug mounted in the basepiece and connected With the headpiece, means for supplying air to said plug, and a device for oscillating said plug, said twyerhead being also provided with an annular ange or rim, substantially as shown and deL scribed. v

a In testimonythat I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses,this 8th day of July, 1901.

GERARD DOAN, Witnesses:

GEORGE S. FORDYCR, ARTHUR L. ENsIGN. 

